Elbow-shaped electric plug

Abstract

The inventive elbow-shaped electric plug comprises first ( 7 ) and second ( 6 ) cylindrical hollow bodies which are fixed to each other and form an angle. The end ( 2 ) of the first body ( 7 ) closed by a plug ( 3 ) is arranged on the end ( 1 ) of the second body ( 6 ), thereby defining a continuous channel between the free ends ( 8, 12 ) of two bodies ( 6, 7 ). The first body ( 7 ) comprises a demountable contact unit ( 5, 11 ). Said electric plug also comprises a cylindrical coaxial cage ( 4 ) arranged in the first body ( 7 ) in such a way that it maintains in the position the demountable contact unit ( 5, 11 ). The cage ( 4 ) is also provided with a recess ( 23 ) embodied on the longitudinal wall thereof and disposed on the side of the free end ( 12 ) of the second cylindrical body ( 6 ).

1 . An elbow-shaped electric plug comprising first ( 7 ) and second ( 6 ) hollow cylindrical bodies fixed to one another and making an angle, one end ( 2 ) of the first body ( 7 ), closed by a stopper ( 3 ), being housed in one end ( 1 ) of the second body ( 6 ) so as to define a continuous passage between the free ends ( 8 ,  12 ) of the two bodies ( 6 ,  7 ), the first body ( 7 ) comprising a removable contact block ( 5 ,  11 ); the electric plug being characterized in that it further comprises a coaxial cylindrical cage ( 4 ) arranged in the first body ( 7 ) in such a way as to hold the removable contact block ( 5 ,  11 ) in position, the cage ( 4 ) further comprising a hollowing ( 23 ) formed on its longitudinal wall of a length shorter than the length of the cylindrical cage and arranged at the same side as the free end ( 12 ) of the second cylindrical body ( 6 ).  
     
     
         2 . The electric plug as claimed in  claim 1 , characterized in that the width of the hollowing ( 23 ) extends over about 180° around the main axis of the cage ( 4 ).  
     
     
         3 . The electric plug as claimed in  claim 1 , characterized in that the length of the hollowing ( 23 ) is slightly shorter than the length of the cage ( 4 ).  
     
     
         4 . The electric plug as claimed in  claim 1  comprising elastic means ( 18 ,  21 ) arranged towards the end of the cage ( 4 ) which is situated at the same end as the stopper ( 3 ) or between said end and the stopper ( 3 ), said means ( 3 ) being produced in such a way as to ensure elastic contact between the cage ( 4 ) and the stopper ( 3 ).  
     
     
         5 . The electric plug as claimed in  claim 4 , characterized in that the cage ( 4 ) comprises an end that is rendered elastic ( 14 ) along the main axis of the cage ( 4 ).  
     
     
         6 . The electric plug as claimed in  claim 5 , characterized in that the elastic end ( 14 ) is hollow, of conical shape, and has radial slots ( 19 ) extending from the vortex of the cone.  
     
     
         7 . The electric plug as claimed in  claim 5 , characterized in that the elastic end ( 14 ) is solid and has a slot ( 20 ) made in a plane perpendicular to the main axis of the cage ( 4 ); that part of the cage ( 4 ) that is situated between the slot ( 20 ) and the stopper ( 3 ) having approximately the shape of a disk ( 21 ), said disk ( 21 ) comprising a protrusion ( 22 ) directed towards the outside of the cage ( 4 ), towards the stopper ( 3 ).  
     
     
         8 . The electric plug as claimed in  claim 5 , characterized in that the cage ( 4 ) is of a length slightly longer than the space available, thereby causing the cage ( 4 ) to be compressed when the connector is closed by the stopper ( 3 ).  
     
     
         9 . The electric plug as claimed in  claim 4 , characterized in that the elastic means are arranged between said end and the stopper ( 3 ).  
     
     
         10 . The electric plug as claimed in  claim 9 , characterized in that the elastic means consist of a component made of elastomer, for example a seal of the O-ring type.  
     
     
         11 . The electric plug as claimed in  claim 9 , characterized in that the elastic means consist of a spring.  
     
     
         12 . The electric plug as claimed in  claim 1 , characterized in that the hollowing ( 23 ) is sufficiently large enough to give the cage ( 4 ) elasticity.  
     
     
         13 . The electric plug as claimed in  claim 1 , characterized in that the end of the first body ( 7 ) which end is housed in the second body ( 6 ), is surrounded by a seal of the O-ring type ( 16 ).  
     
     
         14 . The electric plug as claimed in  claim 1 , comprising a seal of the O-ring type ( 17 ) situated between the first body ( 7 ) and the second body ( 6 ), said seal ( 17 ) being arranged inside the second body ( 6 ) so as also to ensure optimum electrical contact between the bodies ( 6 ,  7 ).  
     
     
         15 . A cylindrical cage ( 4 ) for an elbow-shaped electric plug as defined in  claim 1 , said cage ( 4 ) being designed to be arranged in the first body ( 7 ) of an elbow-shaped plug in such a way as to hold the removable contact block ( 5 ,  11 ) of the elbow-shaped plug in position; the cage ( 4 ) further comprising a hollowing ( 23 ) formed on its longitudinal wall of a length shorter than the length of the cylindrical cage and designed to be arranged on the same side as the free end ( 12 ) of the second cylindrical body ( 6 ) of the elbow-shaped plug.